CN110218468B - Nano environment-friendly coating and preparation method thereof - Google Patents
Nano environment-friendly coating and preparation method thereof Download PDFInfo
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- CN110218468B CN110218468B CN201910394647.XA CN201910394647A CN110218468B CN 110218468 B CN110218468 B CN 110218468B CN 201910394647 A CN201910394647 A CN 201910394647A CN 110218468 B CN110218468 B CN 110218468B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/808—Filtering the mixture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
Abstract
The invention discloses a nano environment-friendly coating and a preparation method thereof, wherein the raw materials respectively comprise 30 percent of silicic acid sol, 25 percent of solvent, 15 percent of modified antibacterial stabilizer, 10 percent of nano silver powder, 10 percent of nano zinc oxide powder, 5 percent of vinyl triethoxysilane and 5 percent of pigment carbon black powder according to weight percentage; the invention firstly greatly improves the antibacterial effect of the product by the synergistic action of the nano silver powder and the nano zinc oxide powder and the secondary synergistic action of the nano silver powder and the methylbenzotriazole in the modified antibacterial stabilizer, greatly prolongs the antibacterial time limit of the product by the additional synergistic action of the pigment carbon black powder and the 2- (2-hydroxy-5-methylphenyl) benzotriazole in the modified antibacterial stabilizer, and improves the antibacterial capability of the product according to the double synergistic action of the antibacterial effect and the additional synergistic action of the antibacterial time limit, so as to avoid the influence on human bodies and environment caused by release of a large amount of harmful substances due to photodecomposition.
Description
Technical Field
The invention relates to the technical field of nano environment-friendly coatings, in particular to a nano environment-friendly coating and a preparation method thereof.
Background
The nano environment-friendly coating is a product formed by butt joint of a nano material and a coating, and belongs to a high-tech functional coating. The coating is prepared by a sol-gel method and other nano material preparation methods, is composed of nano materials with the particle size of less than 100 nanometers, and is widely applied to aspects of house wall painting, vehicle spraying and the like.
However, the existing nano environment-friendly coating has the problem of weak antibacterial capability, and is easy to decompose and discolor due to over-strong or over-long illumination in the long-term use process, so that a large amount of harmful substances are released, the influence on human bodies and the environment is caused, and the use effect is greatly reduced; in the preparation process of the existing nano environment-friendly coating, the mixing and impurity removal efficiency is low, and the phenomenon that the holes are blocked due to the aggregation of impurities, large granular substances or small granular substances easily occurs, so that the mixing and impurity removal effect is greatly influenced.
The solution is now provided in view of the above problems.
Disclosure of Invention
The invention aims at providing a nano environment-friendly coating and a preparation method thereof, the invention divides a coupling agent into three parts, then mixes the three parts with powdery raw materials and liquid raw materials respectively, and mixes the two mixed materials with pigment carbon black powder to obtain the nano environment-friendly coating, the mixed material treatment mode greatly improves the crosslinking degree and the dispersity among the raw materials and ensures that the product quality can be obviously improved, the antibacterial effect of the product can be greatly improved by the synergistic action of nano silver powder and nano zinc oxide powder and the secondary synergistic action of the nano silver powder and methyl benzotriazole in a modified antibacterial stabilizer, the additional synergistic action of the pigment carbon black powder and the 2- (2-hydroxy-5-methylphenyl) benzotriazole in the modified antibacterial stabilizer can greatly prolong the antibacterial time limit of the product, the antibacterial capability of the product is greatly improved according to the double synergistic effect in the aspect of antibacterial effect and the additional synergistic effect in the aspect of antibacterial time limit;
firstly, the nanometer silver powder and the nanometer zinc oxide powder are led into a tank body through a feed inlet together, the electric motor is controlled to work according to a control panel, the electric motor respectively drives a fan blade, a stirring blade and a brush to rotate, the nanometer silver powder and the nanometer zinc oxide powder are rapidly contacted with a filter screen by the fan blade, the nanometer silver powder and the nanometer zinc oxide powder are fully blended and screened by the stirring blade, holes on the filter screen are not easily blocked by impurities, large granular substances or small granular substances by the brush, then the mixed material after primary treatment is led into a trapezoidal guide cover through a guide pipe, the trapezoidal guide cover is of a structure with a wide upper part and a narrow lower part, air flow is gradually compressed to generate secondary acceleration, namely the air flow mixed material is led into a filter screen groove together through the secondary acceleration, when the nanometer silver powder and the nanometer zinc oxide powder in the filter screen groove reach a certain amount, and (3) extending the extension spring until the sliding block is contacted with the self-reset switch, driving the electromagnetic vibrator to vibrate and the warning device to work by the self-reset switch, driving the filter screen groove by the electromagnetic vibrator to carry out secondary blending and screening until the amount of the residual nano silver powder and nano zinc oxide powder in the filter screen groove is in a normal range, and finally leading out the nano silver powder and the nano zinc oxide powder subjected to winnowing blending through a discharge port to finish the whole working process.
The purpose of the invention can be realized by the following technical scheme: a nanometer environmental protection coating, each raw materials are made up of 20-40% silicic acid sol, 10-40% solvent, 10-20% modified antibacterial stabilizer, 5-15% nanometer silver powder, 5-15% nanometer zinc oxide powder, 2-8% vinyl triethoxysilane and 2-8% pigment carbon black powder according to the weight percentage, and the silver ion in the nanometer silver powder can contact with the germ to react, causing the common component of the germ to destroy or generate functional disorder, when the silver ion contacts with the cell membrane of the germ, it can penetrate and react with the intracellular sulfhydryl phase, making the protein solidify, the activity of the cell synthetase reduce, so that the division and proliferation ability of the germ is lost and die, and the nanometer zinc oxide powder can excite the electron from the valence band to the conduction band to leave the cavity, and recombine the conduction band electron and the valence band cavity according to the excitation state, the input energy and heat are eliminated, the valence band hole can rob hydroxyl electrons in the surrounding environment to change the hydroxyl electrons into free radicals, the free radicals are used as a strong oxidant to kill germs, and meanwhile, the antibacterial capability of the product can be further improved due to the combined promotion effect of the nano silver powder and the nano zinc oxide powder; in addition, the micro structure of the pigment carbon black powder has benzoquinone and polynuclear aromatic hydrocarbon structures, so that the pigment carbon black powder has a light shielding effect, and simultaneously contains a phenol group, so that the pigment carbon black powder has oxidation resistance, and the light stability of the product is greatly improved;
the solvent is prepared by mixing deionized water, ethanol and acetone in a weight ratio of 3:1: 1;
the modified antibacterial stabilizer is prepared by the following method: firstly, 3, 4-diaminotoluene and o-nitroaniline are placed in pure water, and are heated and dissolved in a reaction kettle, then sodium nitrite is added, and are mixed for 60 minutes at 40-60 ℃ and 250 revolutions per minute, then sulfuric acid with the concentration of 35% is dropped into the reaction kettle, and are mixed for 120 minutes at 0-10 ℃ and 150 revolutions per minute, after liquid removal and distillation, p-methylphenol is added into the reaction kettle, and are mixed for 90 minutes at 15-25 ℃ and 200 revolutions per minute, and are reduced, acidified, filtered and kept warm to obtain a modified antibacterial stabilizer, wherein the 3, 4-diaminotoluene and the o-nitroaniline in the modified antibacterial stabilizer are reacted with the sodium nitrite and the sulfuric acid with the concentration of 35% in sequence, and are mixed for 120 minutes at 0-10 ℃ and 150 revolutions per minute, and are diazotized to generate a diazotized intermediate product of methylbenzotriazole and the o-nitroaniline, reacting the o-nitroaniline diazotization intermediate product with p-methylphenol, blending for 90 minutes at 15-25 ℃ at 200 r/min, reducing, acidifying, filtering and preserving heat to obtain a blend containing 2- (2-hydroxy-5-methylphenyl) benzotriazole and methylbenzotriazole; the methyl benzotriazole can act on genetic materials or genetic particle structures of pathogenic bacteria to interfere the formation of spindles of the pathogenic bacteria during mitosis, so that the cell division process of the pathogenic bacteria is blocked, the generation of spores can be inhibited to block the synthesis of the genetic materials, the growth of the pathogenic bacteria is inhibited to achieve the antibacterial effect, meanwhile, the 2- (2-hydroxy-5-methylphenyl) benzotriazole can selectively absorb high-energy ultraviolet light in illumination without causing structural change of the pathogenic bacteria, the high-energy ultraviolet light can be fully converted into heat energy or harmless low-energy light waves in an energy conversion mode to be released or completely consumed, so that products are protected from being decomposed and damaged by ultraviolet rays to release a large amount of harmful substances, and the antibacterial effect is played a positive role in prolonging the antibacterial time limit;
the modified antibacterial stabilizer consists of 10-30 wt% of 3, 4-diaminotoluene, 20-40 wt% of o-nitroaniline, 10-30 wt% of sodium nitrite, 10-20 wt% of 35% of sulfuric acid and 10-20 wt% of p-methylphenol.
A preparation method of a nano environment-friendly coating comprises the following steps:
1) uniformly dividing vinyl triethoxysilane into three equal parts, introducing the nano silver powder and the nano zinc oxide powder into a winnowing blending device together, conducting the winnowing blending device out after treating for 30 minutes, placing the winnowing blending device together with one part of vinyl triethoxysilane and silicasol into a stirring kettle, and treating for 90 minutes at 70-80 ℃ at 200 revolutions per minute to obtain a first-grade mixed material;
2) putting a part of vinyltriethoxysilane, a modified antibacterial stabilizer and a solvent into a blending tank, and treating for 90 minutes at 40-60 ℃ and 200 revolutions per minute to obtain a second-level mixed material;
3) one part of vinyltriethoxysilane, a first-stage mixed material, a second-stage mixed material and pigment carbon black powder are placed in a reaction tank together, the mixture is processed for 180 minutes at 55-65 ℃ at 200 revolutions per minute, the mixture is concentrated to 2/5 and filtered and cooled to obtain the nano environment-friendly coating, a coupling agent is divided into three parts, and the three parts are respectively blended with powdery raw materials and liquid raw materials and are combined with the two mixed materials and the pigment carbon black powder to obtain the nano environment-friendly coating.
Wherein, the working process of the wind selection blending equipment in the step 1) is as follows: the method comprises the steps of firstly leading nano silver powder and nano zinc oxide powder into a tank body through a feeding hole, controlling an electric motor to work according to a control panel, driving a fan blade, a stirring blade and a brush to rotate by the electric motor, leading the nano silver powder and the nano zinc oxide powder into a trapezoidal guide cover through a guide pipe after accelerated contact, blending and screening, leading the trapezoidal guide cover into a filter screen groove through secondary acceleration of the trapezoidal guide cover, driving a telescopic spring to extend until a sliding block is in contact with a self-reset switch when the nano silver powder and the nano zinc oxide powder in the filter screen groove reach a certain amount, driving an electromagnetic vibrator to vibrate and alarm by the self-reset switch until the amount of the residual nano silver powder and the nano zinc oxide powder in the filter screen groove is within a normal range, and finally leading the nano silver powder and the nano zinc oxide powder which are subjected to winnowing blending out through a discharging hole to complete the whole working process.
Wherein, the wind separation and blending device in the step 1) comprises an electric motor, a ventilation cover, a feeding hole, a support frame, a stirring blade, a brush, a material guide pipe, a box body, a trapezoidal material guide cover, a connecting rod, a discharging hole, a filter screen groove, an alarm, a control panel, a filter screen, a rotating shaft, a tank body, fan blades, a slide block, a self-reset switch, an electromagnetic vibrator, a telescopic spring and a sliding groove, wherein the control panel is fixed on one side of the support frame through bolts, the alarm is arranged in the control panel, the tank body is fixed on the upper end of the support frame through bolts, the feeding hole is correspondingly arranged on two sides of the tank body, the filter screen is movably connected in the tank body through a buckle, the ventilation cover is fixed in the center of the top of the tank body through welding, the electric motor is fixed in the center of the top of the ventilation cover through bolts, and the rotating shaft is movably connected on one side of the electric motor through a coupling, the rotating shaft penetrates through the filter screen, stirring blades and brushes are respectively fixed on two sides of the filter screen outside the rotating shaft through bolts, fan blades are fixed on the outer portion of the rotating shaft close to the joint of the ventilation cover and the tank body through welding, the stirring blades and the brushes are respectively located on the upper side and the lower side of the filter screen, the stirring blades and the brushes are arranged vertically in parallel, and the hair surface of the brushes is in contact with the filter screen so as to prevent the filter screen from being blocked due to the accumulation of impurities, large granular substances or small granular substances and further influence the normal mixing and impurity removing effect;
the lower end of the supporting frame is fixed with a box body through a bolt, the bottom of the tank body is fixed with a material guide pipe through welding, the bottom of the material guide pipe is fixed with a trapezoidal material guide cover through a bolt, the trapezoidal material guide cover and the box body are fixed through welding, a discharge hole is formed in the center of the bottom of the box body, sliding grooves are correspondingly formed in the inner walls of the two sides of the box body, a sliding block is installed inside each sliding groove, a telescopic spring is fixed on one side of the inner wall of the top of each sliding groove and one side of the corresponding sliding block through welding, a self-reset switch is installed on one side of the inner wall of the bottom of each sliding groove, the self-reset switch and the sliding block are of a matched structure, one side of each sliding block is movably connected with a connecting rod through a hinge, a filter screen groove is movably connected between the two connecting rods, the self-reset switch is electrically connected with the electromagnetic vibrator and the warning device, and the control panel is electrically connected with the electric motor.
The invention has the beneficial effects that:
1. in the invention, the coupling agent is evenly divided into three parts, then the coupling agent is respectively blended with the powdery raw materials and the liquid raw materials, and the nano environment-friendly coating is obtained by blending the coupling agent and the powdery raw materials and the liquid raw materials and combining the pigment carbon black powder with the mixture of the powdery raw materials and the liquid raw materials, and the nano environment-friendly coating is obtained, the crosslinking degree and the dispersity among the raw materials are greatly improved by the mixed material processing mode, the antibacterial effect of the product can be greatly improved by the synergistic action of the nano silver powder and the nano zinc oxide powder and the secondary synergistic action of the nano silver powder and the methylbenzotriazole in the modified antibacterial stabilizer, the antibacterial time limit of the product can be greatly prolonged by the additional synergistic action of the pigment carbon black powder and the 2- (2-hydroxy-5-methylphenyl) benzotriazole in the modified antibacterial stabilizer, and further according to the double synergistic action in the antibacterial effect and the additional synergistic action in the antibacterial time limit, the antibacterial capacity of the product is obviously improved, so that the product is prevented from being decomposed and discolored due to over-strong or over-long illumination in the long-term use process, and then a large amount of harmful substances are released to influence human bodies and the environment, and the use effect is greatly reduced;
2. this selection by winnowing blending equipment is in dual blending, on the basis of screening, can also effectually avoid impurity, the condition of large granule material or little particulate matter gathering and blocking the hole takes place, and at first blending, when screening, the hole that avoids on the filter screen by the brush of reverse setting blocks, and at the secondary blending, when screening, when the filter screen groove surpasss self can the initiative filterable scope volume, drive electromagnetic vibrator work by from reset switch, and drive the vibration of filter screen groove according to electromagnetic vibrator, make the dispersion that each powder can be abundant come, in order to avoid the hole on the filter screen groove to block, fan blade is simultaneously accelerated by the elementary of self and the second grade acceleration effect of trapezoidal guide cover, make the rate of motion of each powder accelerate, promotion work efficiency that can also be great when having guaranteed mixed edulcoration effect.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a front cross-sectional view of an air classification blending apparatus of the present invention;
FIG. 2 is a schematic view of the structure of area A in FIG. 1 according to the present invention;
in the figure: 1. an electric motor; 2. a ventilation cover; 3. a feed inlet; 4. a support frame; 5. a stirring blade; 6. a brush; 7. a material guide pipe; 8. a box body; 9. a trapezoidal material guide cover; 10. a connecting rod; 11. a discharge port; 12. a filter screen groove; 13. an alarm; 14. a control panel; 15. a filter screen; 16. a rotating shaft; 17. a tank body; 18. a fan blade; 19. a slider; 20. a self-reset switch; 21. an electromagnetic vibrator; 22. a tension spring; 23. a chute.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, the present invention provides a technical solution:
example 1:
the nanometer environment protecting paint consists of silicic acid sol 30 wt%, solvent 25 wt%, modified antiseptic stabilizer 15 wt%, nanometer silver powder 10 wt%, nanometer zinc oxide powder 10 wt%, vinyl triethoxy silane 5 wt% and pigment black carbon powder 5 wt%;
the solvent is prepared by mixing deionized water, ethanol and acetone in a weight ratio of 3:1: 1;
the modified antibacterial stabilizer is prepared by the following method: firstly, 3, 4-diaminotoluene and o-nitroaniline are placed in pure water, and are heated and dissolved in a reaction kettle, then sodium nitrite is added into the reaction kettle, the mixture is blended for 60 minutes at 50 ℃ and 250 revolutions per minute, sulfuric acid with the concentration of 35% is dripped into the reaction kettle, the mixture is blended for 120 minutes at 5 ℃ and 150 revolutions per minute, after liquid removal and distillation, p-methylphenol is added into the mixture, the mixture is blended for 90 minutes at 20 ℃ and 200 revolutions per minute, and after reduction acidification and filtration heat preservation, the modified antibacterial stabilizer is obtained;
the modified antibacterial stabilizer consists of 20 weight percent of 3, 4-diaminotoluene, 30 weight percent of o-nitroaniline, 20 weight percent of sodium nitrite, 15 weight percent of 35 percent of sulfuric acid and 15 weight percent of p-methylphenol.
A preparation method of a nano environment-friendly coating comprises the following steps:
1) uniformly dividing vinyl triethoxysilane into three equal parts, introducing the nano silver powder and the nano zinc oxide powder into a winnowing blending device together, conducting the winnowing blending device out after treating for 30 minutes, placing the winnowing blending device together with one part of vinyl triethoxysilane and silicic acid sol into a stirring kettle, and treating for 90 minutes at 75 ℃ and 200 revolutions per minute to obtain a first-grade mixed material;
2) putting a part of vinyltriethoxysilane, a modified antibacterial stabilizer and a solvent into a blending tank, and treating for 90 minutes at 50 ℃ and 200 revolutions per minute to obtain a second-level mixed material;
3) and (3) putting a part of vinyltriethoxysilane, the first-stage mixed material, the second-stage mixed material and pigment carbon black powder into a reaction tank, treating for 180 minutes at 60 ℃ and 200 revolutions per minute, concentrating to 2/5, filtering and cooling to obtain the nano environment-friendly coating.
Example 2:
the difference between the nano environment-friendly coating and the embodiment 1 is that each raw material comprises, by weight, 35% of silicic acid sol, 30% of solvent, 15% of modified antibacterial stabilizer, 10% of nano zinc oxide powder, 5% of vinyl triethoxysilane and 5% of pigment carbon black powder.
A preparation method of a nano environment-friendly coating is different from that in the embodiment 1 in that 1) vinyl triethoxysilane is divided into two equal parts, then nano zinc oxide powder is led into air separation blending equipment, is led out after being treated for 30 minutes, is placed into a stirring kettle together with one part of vinyl triethoxysilane and silicic acid sol, and is treated for 90 minutes at 75 ℃ and 200 revolutions per minute to obtain a first-grade mixed material.
Example 3:
the difference between the nano environment-friendly coating and the embodiment 1 is that each raw material comprises, by weight, 35% of silicic acid sol, 37.5% of solvent, 17.5% of modified antibacterial stabilizer, 5% of vinyl triethoxysilane and 5% of pigment carbon black powder.
A preparation method of a nano environment-friendly coating is different from that in the embodiment 1 in that 1) firstly, vinyl triethoxysilane is equally divided into two equal parts, then one part of vinyl triethoxysilane, a modified antibacterial stabilizer and a solvent are placed in a blending tank together, and the mixture is treated for 90 minutes at 50 ℃ and 200 revolutions per minute to obtain a mixed material; 2) putting a part of vinyltriethoxysilane, the mixed material, the silica sol and the pigment carbon black powder into a reaction tank, treating for 180 minutes at 60 ℃ and 200 revolutions per minute, concentrating to 2/5, filtering and cooling to obtain the nano environment-friendly coating.
Example 4:
the difference between the nano environment-friendly coating and the embodiment 1 is that the modified antibacterial stabilizer is prepared by the following method: firstly, putting o-nitroaniline into pure water, heating and dissolving the o-nitroaniline in a reaction kettle, adding sodium nitrite into the reaction kettle, blending the mixture for 60 minutes at 50 ℃ and 250 revolutions per minute, then dripping 35 percent sulfuric acid into the reaction kettle, blending the mixture for 120 minutes at 5 ℃ and 150 revolutions per minute, removing liquid and distilling the mixture, then adding p-methylphenol into the mixture, blending the mixture for 90 minutes at 20 ℃ and 200 revolutions per minute, and performing reduction acidification, filtration and heat preservation to obtain a modified antibacterial stabilizer;
the modified antibacterial stabilizer consists of 40 weight percent of o-nitroaniline, 30 weight percent of sodium nitrite, 15 weight percent of 35 percent of sulfuric acid and 15 weight percent of p-methylphenol.
A preparation method of the nano environment-friendly coating, which is the same as the preparation method of the nano environment-friendly coating in the embodiment 1.
Example 5:
the difference between the nano environment-friendly coating and the embodiment 1 is that the modified antibacterial stabilizer is prepared by the following method: firstly, 3, 4-diaminotoluene is placed in pure water, and is heated and dissolved in a reaction kettle, then sodium nitrite is added into the reaction kettle, the mixture is blended for 60 minutes at 50 ℃ and 250 revolutions per minute, sulfuric acid with the concentration of 35% is dripped into the reaction kettle, the mixture is blended for 120 minutes at 5 ℃ and 150 revolutions per minute, after liquid removal and distillation, p-methylphenol is added into the mixture, the mixture is blended for 90 minutes at 20 ℃ and 200 revolutions per minute, and after reduction acidification, filtration and heat preservation, the modified antibacterial stabilizer is obtained;
the modified antibacterial stabilizer consists of 30 percent by weight of 3, 4-diaminotoluene, 30 percent by weight of sodium nitrite, 20 percent by weight of 35 percent by weight of sulfuric acid and 20 percent by weight of p-methylphenol.
A preparation method of the nano environment-friendly coating, which is the same as the preparation method of the nano environment-friendly coating in the embodiment 1.
Example 6:
the difference between the nano environment-friendly coating and the embodiment 1 is that each raw material respectively comprises 35 percent of silicic acid sol, 30 percent of solvent, 12.5 percent of nano silver powder, 12.5 percent of nano zinc oxide powder, 5 percent of vinyl triethoxysilane and 5 percent of pigment carbon black powder according to weight percentage; the proportion and the preparation process of the modified antibacterial stabilizer are not needed.
The preparation method of the nano environment-friendly coating is different from that in the embodiment 1 in that 2) one part of vinyltriethoxysilane and a solvent are placed in a blending tank together, and the mixture is treated at 50 ℃ and 200 rpm for 90 minutes to obtain a secondary mixed material.
Comparative results obtained according to the above examples 1 to 6 are given in the following table:
TABLE 1 statistical Table of comparison data
From table 1-comparison data statistics table of example 1 and example 2 and example 3, it is known that, the difference between the 15-day bacteriostatic rate and the minimum bacteriostatic concentration is larger than that in example 1, and the difference between the 15-day bacteriostatic rate and the minimum bacteriostatic concentration is larger than that in example 2, because no silver nanoparticle powder is present in example 2, no silver nanoparticle powder and no zinc oxide nanoparticle are present in example 3, and silver ions in the silver nanoparticle powder can contact and react with pathogens to cause the destruction of common components or functional disorder of the pathogens, when the silver ions contact and adsorb with cell membranes of the pathogens, the silver ions can penetrate through cell walls and react with intracellular sulfhydryl groups to solidify proteins and reduce the activity of cell synthetases, so that the pathogens lose their ability to proliferate and die, and the zinc oxide nanoparticle can excite electrons from valence bands to conduction bands to leave holes, the input energy and heat are eliminated according to the recombination of excited conduction band electrons and valence band holes, and meanwhile, the valence band holes can rob hydroxyl electrons in the surrounding environment to change the hydroxyl electrons into free radicals and serve as strong oxidants to kill germs; thus, the numerical differences between example 1 and examples 2 and 3 are significant, and the numerical differences between example 3 and example 2 are greater;
as can be seen from table 1-comparison of example 1 and example 4 in the comparison data statistical table, the difference between the 15-day bacteriostatic rate and the minimum bacteriostatic concentration is larger than that in example 1, because 3, 4-diaminotoluene does not react with sodium nitrite and 35% sulfuric acid in sequence in example 4, and the mixture is blended for 120 minutes at 5 degrees and 150 rpm and undergoes diazotization to generate methylbenzotriazole, which can act on genetic material or genetic particle structure of pathogenic bacteria to interfere the formation of spindle body of pathogenic bacteria during mitosis, so that the cell division process is blocked, and the generation of spores can be inhibited to block the synthesis of genetic material, thereby inhibiting the growth of pathogenic bacteria to achieve the antibacterial effect; thus, the numerical differences between example 1 and example 4 are obvious;
as shown by the comparison of example 1 and example 5 in the statistical table of the comparative data of Table 1, the change rate of the antibacterial activity of 30 days is greatly different from that of example 1 because no o-nitroaniline exists in example 5, which reacts with sodium nitrite and 35% sulfuric acid in sequence, the o-nitroaniline reacts at 5 ℃ and 150 rpm, the o-nitroaniline diazotization intermediate product is generated through diazotization, the o-nitroaniline diazotization intermediate product reacts with p-methylphenol, the o-nitroaniline diazotization intermediate product is mixed at 20 ℃ and 200 rpm for 90 minutes through reduction acidification and filtration heat preservation to obtain 2- (2-hydroxy-5-methylphenyl) benzotriazole, and the 2- (2-hydroxy-5-methylphenyl) benzotriazole can selectively absorb high-energy ultraviolet light in the light without causing structural change of the 2- (2-hydroxy-5-methylphenyl) benzotriazole, the high-energy ultraviolet light energy is fully converted into heat energy or harmless low-energy light waves in an energy conversion mode to be released or completely consumed, so that the product is protected from being decomposed and damaged by ultraviolet rays to release a large amount of harmful substances, and the antibacterial effect is played in the aspect of prolonging the antibacterial time limit; thus, the values in example 1 are significantly different from those in example 5;
as can be seen from table 1-comparison between example 1 and example 6 in the comparative data statistical table, the difference between the antibacterial rate of 15 days, the minimum inhibitory concentration and the antibacterial activity change rate of 30 days is greater than that in example 1, because example 6 satisfies both the case of example 4 and the case of example 5, and thus is not related to the improvement of antibacterial effect and the extension of antibacterial time limit; thus, the difference between the values in example 1 and example 6 is significant.
Wherein, the working principle of the winnowing and blending equipment is as follows: firstly, the nanometer silver powder and the nanometer zinc oxide powder are led into a tank body 17 through a feeding hole 3, the electric motor 1 is controlled to work according to a control panel 14, the electric motor 1 respectively drives a fan blade 18, a stirring blade 5 and a brush 6 to rotate, the nanometer silver powder and the nanometer zinc oxide powder are rapidly contacted with a filter screen 15 through the fan blade 18, the nanometer silver powder and the nanometer zinc oxide powder are fully blended and screened through the stirring blade 15, holes on the filter screen 15 are not easily blocked by impurities, large granular substances or small granular substances through the brush 6, the primarily processed mixed material is led into a trapezoidal guide cover 9 through a guide pipe 7, the trapezoidal guide cover 9 is of a structure with a wide upper part and a narrow lower part, air flow is gradually compressed to generate secondary acceleration, namely, the air flow is led into a filter screen groove 12 with the mixed material through the secondary acceleration, when the nanometer silver powder and the nanometer zinc oxide powder in the filter screen groove 12 reach a certain amount, the extension spring 22 is driven to extend until the slide block 19 is in contact with the self-reset switch 20, the self-reset switch 20 drives the electromagnetic vibrator 21 to vibrate and the warning device 13 to work, the electromagnetic vibrator 21 drives the filter screen groove 12 to carry out secondary blending and screening until the amount of the residual nano silver powder and nano zinc oxide powder in the filter screen groove 12 is in a normal range, and finally the nano silver powder and the nano zinc oxide powder which are subjected to air separation and blending are led out through the discharge hole 11 to complete the whole working process;
on the basis of double blending and screening, the winnowing blending equipment can also effectively avoid the situation that the holes are blocked due to the aggregation of impurities, large-particle substances or small-particle substances, when the first blending and screening are carried out, the brush 6 arranged reversely is used for avoiding the blockage of the holes on the filter screen 15, and when the second blending and screening are carried out, when the filter screen groove 12 exceeds the range amount capable of actively filtering, the self-reset switch 20 drives the electromagnetic vibrator 21 to work, and drives the filter screen groove 12 to vibrate according to the electromagnetic vibrator 21, so that all the powder can be fully dispersed to avoid the blockage of the holes on the filter screen groove 12, meanwhile, the primary acceleration of the fan blades 18 and the secondary acceleration of the trapezoidal material guide cover 9 accelerate the movement rate of each powder, so that the mixing and impurity removing effects are guaranteed, and the working efficiency can be greatly improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The nano environment-friendly coating is characterized by comprising 20-40 wt% of silicic acid sol, 10-40 wt% of solvent, 10-20 wt% of modified antibacterial stabilizer, 5-15 wt% of nano silver powder, 5-15 wt% of nano zinc oxide powder, 2-8 wt% of vinyl triethoxysilane and 2-8 wt% of pigment carbon black powder;
the solvent is prepared by mixing deionized water, ethanol and acetone in a weight ratio of 3:1: 1;
the modified antibacterial stabilizer is prepared by the following method: firstly, 3, 4-diaminotoluene and o-nitroaniline are placed in pure water, and are heated and dissolved in a reaction kettle, then sodium nitrite is added into the reaction kettle, the mixture is blended for 60 minutes at 40-60 ℃ and 250 revolutions per minute, then sulfuric acid with the concentration of 35% is dripped into the reaction kettle, the mixture is blended for 120 minutes at 0-10 ℃ and 150 revolutions per minute, after liquid removal and distillation, p-methylphenol is added into the mixture, the mixture is blended for 90 minutes at 15-25 ℃ and 200 revolutions per minute, and after reduction acidification, filtration and heat preservation, the modified antibacterial stabilizer is obtained;
the modified antibacterial stabilizer consists of 10-30 wt% of 3, 4-diaminotoluene, 20-40 wt% of o-nitroaniline, 10-30 wt% of sodium nitrite, 10-20 wt% of 35% of sulfuric acid and 10-20 wt% of p-methylphenol.
2. The preparation method of the nano environment-friendly paint as claimed in claim 1, characterized by comprising the following steps:
1) uniformly dividing vinyl triethoxysilane into three equal parts, introducing the nano silver powder and the nano zinc oxide powder into a winnowing blending device together, conducting the winnowing blending device out after treating for 30 minutes, placing the winnowing blending device together with one part of vinyl triethoxysilane and silicasol into a stirring kettle, and treating for 90 minutes at 70-80 ℃ at 200 revolutions per minute to obtain a first-grade mixed material;
2) putting a part of vinyltriethoxysilane, a modified antibacterial stabilizer and a solvent into a blending tank, and treating for 90 minutes at 40-60 ℃ and 200 revolutions per minute to obtain a second-level mixed material;
3) and (3) putting a part of vinyltriethoxysilane, the first-stage mixed material, the second-stage mixed material and pigment carbon black powder into a reaction tank, treating for 180 minutes at 55-65 ℃ at 200 revolutions per minute, concentrating to 2/5, filtering and cooling to obtain the nano environment-friendly coating.
3. The method for preparing the nano environment-friendly coating according to claim 2, wherein the working process of the wind sorting blending equipment in the step 1) is as follows: firstly, nanometer silver powder and nanometer zinc oxide powder are led into a tank body (17) through a feeding hole (3) together, an electric motor (1) is controlled to work according to a control panel (14), the electric motor (1) respectively drives a fan blade (18), a stirring blade (5) and a brush (6) to rotate, after accelerated contact, blending and screening, the nanometer silver powder and the nanometer zinc oxide powder are led into a trapezoidal guide cover (9) through a guide pipe (7), and are led into a filter screen groove (12) through secondary acceleration of the trapezoidal guide cover (9), when the nanometer silver powder and the nanometer zinc oxide powder in the filter screen groove (12) reach a certain amount, a telescopic spring (22) is driven to extend until a sliding block (19) is in contact with a self-reset switch (20), the self-reset switch (20) drives an electromagnetic vibrator (21) to vibrate and a warning device (13) to work until the amount of the nanometer silver powder and the nanometer zinc oxide powder left in the filter screen groove (12) is in a normal range, and finally, the nano silver powder and the nano zinc oxide powder which are subjected to air separation and blending are led out through a discharge hole (11) to complete the whole working process.
4. The preparation method of the nano environment-friendly paint according to claim 3, characterized in that the wind sorting and blending equipment in the step 1) consists of an electric motor (1), a ventilation cover (2), a feeding hole (3), a support frame (4), stirring blades (5), a brush (6), a material guide pipe (7), a box body (8), a trapezoidal material guide cover (9), a connecting rod (10), a discharging hole (11), a filter screen groove (12), a warning device (13), a control panel (14), a filter screen (15), a rotating shaft (16), a tank body (17), fan blades (18), a slide block (19), a self-resetting switch (20), an electromagnetic vibrator (21), a telescopic spring (22) and a sliding groove (23), wherein the control panel (14) is fixed on one side of the support frame (4) through bolts, and the warning device (13) is arranged inside the control panel (14), the upper end of the supporting frame (4) is fixed with a tank body (17) through a bolt, the two sides of the tank body (17) are correspondingly provided with a feeding hole (3), the interior of the tank body (17) is movably connected with a filter screen (15) through a buckle, the center of the top of the tank body (17) is fixedly provided with a ventilation cover (2) through welding, an electric motor (1) is fixed at the center of the top of the ventilation cover (2) through a bolt, one side of the electric motor (1) is movably connected with a rotating shaft (16) through a coupler, the rotating shaft (16) penetrates through the filter screen (15), and the outer part of the rotating shaft (16) is positioned at the two sides of the filter screen (15) and is respectively fixed with a stirring blade (5) and a brush (6) through bolts, fan blades (18) are fixed on the outer portion of the rotating shaft (16) close to the joint of the ventilation cover (2) and the tank body (17) through welding;
the lower end of the support frame (4) is fixed with a box body (8) through bolts, the bottom of the tank body (17) is fixed with a material guide pipe (7) through welding, the bottom of the material guide pipe (7) is fixed with a trapezoidal material guide cover (9) through bolts, the trapezoidal material guide cover (9) and the box body (8) are fixed through welding, a discharge hole (11) is formed in the center of the bottom of the box body (8), sliding grooves (23) are correspondingly formed in the inner walls of the two sides of the box body (8), a sliding block (19) is installed inside the sliding groove (23), a telescopic spring (22) is fixed through welding between one side of the inner wall of the top of the sliding groove (23) and one side of the sliding block (19), a self-resetting switch (20) is installed on one side of the inner wall of the bottom of the sliding groove (23), the self-resetting switch (20) and the sliding block (19) are of a matched structure, and there are filter screen groove (12) through hinge swing joint between two connecting rods (10), the aperture ratio filter screen (15) of filter screen groove (12) is little twice, electromagnetic vibrator (21) is installed to the bottom of connecting rod (10), from reset switch (20) and electromagnetic vibrator (21) and attention device (13) electric connection, control panel (14) and electric motor (1) electric connection.
5. The method for preparing nano environment-friendly paint according to claim 4, characterized in that the stirring blade (5) and the brush (6) are respectively positioned at the upper side and the lower side of the filter screen (15), the stirring blade (5) and the brush (6) are vertically arranged in parallel, and the hair side of the brush (6) is in contact with the filter screen (15).
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| US7736423B2 (en) * | 2005-08-29 | 2010-06-15 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Aqueous composition for outdoor paints, indoor paints, facade paints and roof paints |
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| CN102060794A (en) * | 2010-12-30 | 2011-05-18 | 利安隆（天津）化工有限公司 | Method for refining crude benzotriazole ultraviolet absorber |
| CN104893519A (en) * | 2015-05-11 | 2015-09-09 | 广德加点化工有限公司 | Modified aqueous alkyd resin coating |
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